Use these options to specify how the date range returns results. "Exact" means that the start and end dates of descriptions returned must fall entirely within the date range entered. "Overlapping" means that any description whose start or end dates touch or overlap the target date range will be returned.

The fonds consists of a file of writings and correspondence created and collected by John Campbell. Contents include 2 manuscripts (ca.1990) written by Campbell on religious themes, a covering letter (April 1991) introducing himself and his work, ...